Ebay for the FOB. I ordered a keyless entry module for my '97 OBS and it's H7110AS010, Then got one for my daughters 2000 OBS, it's H7110AS011.
The interiors changed between '97 and '98. What applies here is that in '98 - '01 there is a door lock button in the arm rest. In '97 the driver door can lock the others by using the lock in the door handle or the key.
So I think your unit will work in your '98 and am surprised it worked in a '97. But not half as surprised as I am to learn today that I can not just plug in either/both my units. Was looking for the plugs today!
